Fix dependencies for production

Gemfile

@@ -6,6 +6,8 @@ gem 'rake'
 gem 'rackup'
 gem 'puma'
 gem 'sqlite3'
+gem 'base64', '0.1.1'
+gem 'forwardable', '1.3.2'
 gem 'bcrypt'
 gem 'gettext'
 gem 'chartkick'

Gemfile.lock

@@ -19,7 +19,7 @@ GEM
       minitest (>= 5.1)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
-    base64 (0.2.0)
+    base64 (0.1.1)
     bcrypt (3.1.20)
     benchmark (0.4.0)
     bigdecimal (3.1.9)
@@ -28,7 +28,7 @@ GEM
     connection_pool (2.5.0)
     drb (2.2.1)
     erubi (1.13.1)
-    forwardable (1.3.3)
+    forwardable (1.3.2)
     gettext (3.5.1)
       erubi
       locale (>= 2.0.5)
@@ -91,8 +91,10 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  base64 (= 0.1.1)
   bcrypt
   chartkick
+  forwardable (= 1.3.2)
   gettext
   puma
   rackup
@@ -102,4 +104,4 @@ DEPENDENCIES
   sqlite3
 
 BUNDLED WITH
-   2.5.22
+   2.3.15